I find IPE to be a life-savior when it comes to generating physics illustrations which come with their share of math toppings. The editor has nice utilities for latching on to the boundaries, intersection, center etc of geometric figures. The spline tool is the best I have seen anywhere. Layers are handled with grace. LaTeX is rendered instantly. It is very easy to produce a multipage document. What more can one possibly want?
Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
Epic Pen - A windows tool for drawing over your desktop and applications
PGF and TikZ - PGF/TikZ is a tandem of languages for producing vector graphics from a geometric/algebraic...
ZoomIt - Presentation utility for zooming and drawing on the screen.
LaTeXDraw - LaTeXDraw is a graphical drawing editor for LaTeX.
Pointofix - Pointofix unterstützt Sie bei Vorträgen, Schulungen und Präsentationen. Zeichnen Sie direkt auf dem Bildschirm und heben Sie wichtige Inhalte hervor. Pointofix ist kostenlos.